(19)

(11)

EP 1 141 172 A1

(12)

(43) Date of publication: 10.10.2001 Bulletin 2001/41 (21) Application number: 99954274.9 (22) Date of filing: 17.11.1999

(51) International Patent Classification (IPC)7: C09K 19/02, C09K 19/12, C09K 19/54 (86) International application number: PCT/GB9903/820 (87) International publication number: WO 0029/505 (25.05.2000 Gazette 2000/21)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 17.11.1998 GB 9825124 13.05.1999 GB 9911032 (71) Applicant: QinetiQ Limited London, SW1 6TD (GB)	(72) Inventors: BEER, Alexander D-14129 Berlin (DE) GOODBY, John, William Hull HU6 7RX (GB) HIRD, Michael Hull HU6 7RX (GB) KELLY, Stephen, Malcolm Hull HU6 7RX (GB)